1 files changed, 67 insertions, 0 deletions
diff --git a/app/scripts/keyrings/simple.js b/app/scripts/keyrings/simple.js
new file mode 100644
index 000000000..ee743bc03
--- /dev/null
+++ b/app/scripts/keyrings/simple.js
@@ -0,0 +1,67 @@
+const EventEmitter = require('events').EventEmitter
+const Wallet = require('ethereumjs-wallet')
+const ethUtil = require('ethereumjs-util')
+const type = 'Simple Key Pair'
+const sigUtil = require('../lib/sig-util')
+
+module.exports = class SimpleKeyring extends EventEmitter {
+
+  static type () {
+    return type
+  }
+
+  constructor (opts) {
+    super()
+    this.type = type
+    this.opts = opts || {}
+    this.wallets = []
+  }
+
+  serialize () {
+    return this.wallets.map(w => w.getPrivateKey().toString('hex'))
+  }
+
+  deserialize (wallets = []) {
+    this.wallets = wallets.map((w) => {
+      var b = new Buffer(w, 'hex')
+      const wallet = Wallet.fromPrivateKey(b)
+      return wallet
+    })
+  }
+
+  addAccounts (n = 1) {
+    var newWallets = []
+    for (var i = 0; i < n; i++) {
+      newWallets.push(Wallet.generate())
+    }
+    this.wallets = this.wallets.concat(newWallets)
+    return newWallets.map(w => w.getAddress().toString('hex'))
+  }
+
+  getAccounts () {
+    return this.wallets.map(w => w.getAddress().toString('hex'))
+  }
+
+  // tx is an instance of the ethereumjs-transaction class.
+  signTransaction (address, tx) {
+    const wallet = this.getWalletForAccount(address)
+    var privKey = wallet.getPrivateKey()
+    tx.sign(privKey)
+    return tx
+  }
+
+  // For eth_sign, we need to sign transactions:
+  signMessage (withAccount, data) {
+    const wallet = this.getWalletForAccount(withAccount)
+    const message = ethUtil.removeHexPrefix(data)
+    var privKey = wallet.getPrivateKey()
+    var msgSig = ethUtil.ecsign(new Buffer(message, 'hex'), privKey)
+    var rawMsgSig = ethUtil.bufferToHex(sigUtil.concatSig(msgSig.v, msgSig.r, msgSig.s))
+    return rawMsgSig
+  }
+
+  getWalletForAccount (account) {
+    return this.wallets.find(w => w.getAddress().toString('hex') === account)
+  }
+
+}